Conveying modulation and coding information for an uplink data transmission

ABSTRACT

Various embodiments disclosed herein provide for an improved system for selecting and conveying modulation scheme information for an uplink transmission. A network device can determine the channel state information for an uplink transmission based on sounding reference signals received from a user equipment device, and then select a modulation scheme for the uplink transmission based on the channel state information and associated signal to noise ratio. The network device can then send an indication of the selection to the user equipment device using an index number comprising six bits that correspond to an index number in a table of modulation schemes. The table of modulation schemes can include modulation schemes that use transform precoding, as well as modulation schemes that do not use transform precoding.

RELATED APPLICATION

The subject patent application is a continuation of, and claims priorityto, U.S. patent application Ser. No. 15/978,833, filed May 14, 2018, andentitled “CONVEYING MODULATION AND CODING INFORMATION FOR AN UPLINK DATATRANSMISSION,” the entirety of which application is hereby incorporatedby reference herein.

TECHNICAL FIELD

The present application relates generally to the field of mobilecommunication and, more specifically, to conveying modulation and codinginformation for a NR or 5G uplink data transmission in a next generationwireless communications network.

BACKGROUND

To meet the huge demand for data centric applications, Third GenerationPartnership Project (3GPP) systems and systems that employ one or moreaspects of the specifications of the Fourth Generation (4G) standard forwireless communications will be extended to a Fifth Generation (5G)standard for wireless communications. Unique challenges exist to providelevels of service associated with forthcoming 5G and other nextgeneration network standards.

BRIEF DESCRIPTION OF THE DRAWINGS

Non-limiting and non-exhaustive embodiments of the subject disclosureare described with reference to the following figures, wherein likereference numerals refer to like parts throughout the various viewsunless otherwise specified.

FIG. 1 illustrates an example wireless communication system inaccordance with various aspects and embodiments of the subjectdisclosure.

FIG. 2 illustrates an example block diagram showing a message sequencechart in accordance with various aspects and embodiments of the subjectdisclosure.

FIG. 3 illustrates an example block diagram showing a traditionalmodulation scheme indication system.

FIG. 4 illustrates an example block diagram showing an improvedmodulation scheme indication system in accordance with various aspectsand embodiments of the subject disclosure.

FIG. 5 illustrates an example block diagram of a network deviceconfigured to select and convey a selection of a modulation scheme inaccordance with various aspects and embodiments of the subjectdisclosure.

FIG. 6 illustrates an example flowchart showing a decision tree forselecting and conveying modulation scheme information in accordance withvarious aspects and embodiments of the subject disclosure.

FIG. 7 illustrates an example method for selecting and conveyingmodulation scheme information in accordance with various aspects andembodiments of the subject disclosure.

FIG. 8 illustrates an example method for selecting and conveyingmodulation scheme information in accordance with various aspects andembodiments of the subject disclosure.

FIG. 9 illustrates an example block diagram of an example user equipmentthat can be a mobile handset operable to provide a format indicator inaccordance with various aspects and embodiments of the subjectdisclosure.

FIG. 10 illustrates an example block diagram of a computer that can beoperable to execute processes and methods in accordance with variousaspects and embodiments of the subject disclosure.

DETAILED DESCRIPTION

One or more embodiments are now described with reference to thedrawings, wherein like reference numerals are used to refer to likeelements throughout. In the following description, for purposes ofexplanation, numerous specific details are set forth in order to providea thorough understanding of the various embodiments. It is evident,however, that the various embodiments can be practiced without thesespecific details (and without applying to any particular networkedenvironment or standard).

Various embodiments disclosed herein provide for an improved system forselecting and conveying modulation scheme information for an uplinktransmission. A network device can determine the channel stateinformation for an uplink transmission based on sounding referencesignals received from a user equipment (UE) device, and then select amodulation scheme for the uplink transmission based on the channel stateinformation and associated signal to noise ratio. The network device canthen send an indication of the selection to the user equipment deviceusing an index number comprising six bits that correspond to an indexnumber in a table of modulation schemes. The table of modulation schemescan include modulation schemes that use transform precoding, as well asmodulation schemes that do not use transform precoding.

In traditional systems, the network can first indicate in radio resourcecontrol RRC signaling whether or not transform precoding will be used,and then later, in the downlink control channel, the network willindicate to the UE which modulation scheme will be used by including theindex number of the selected modulation scheme. In the traditionalsystem however, there are two tables, one that comprises modulationschemes associated with transform precoding, and one that comprisestables associated with no transform precoding. The problem with thisapproach however, is that RRC signaling does not occur as often asdownlink control channel information is sent, and so the system is lessable to adapt to changing channel state information. By sending anindication of the index number from a table the comprises both transformprecoding and non-transform precoding modulation schemes with thedownlink control channel information, the network can adapt to thechanging signal to noise ratio and channel state information morerapidly.

While reference is generally made throughout the disclosure to uplinkdata transmissions, in other embodiments, the principles disclosedherein can apply to downlink transmissions as well.

In various embodiments, a base station device can comprise a processorand a memory that stores executable instructions that, when executed bythe processor facilitate performance of operations. The operations cancomprise determining channel state information for an uplink datatransmission based on an uplink reference signal. The operations canalso comprise selecting a modulation scheme for the uplink datatransmission based on the channel state information. The operations canalso comprise facilitating transmitting a selection of the modulationscheme on a downlink control channel transmission, wherein the selectionof the modulation scheme comprises an index number from a data structurecomprising a first group of transform precoding enabled modulationschemes and a second group of transform precoding disabled modulationschemes.

In another embodiment, method comprises determining, by a network devicecomprising a processor, a signal to noise ratio associated with anuplink data transmission based on an uplink reference signal. The methodcan also comprise selecting, by the network device, a modulation schemefor the uplink data transmission based on the signal to noise ratio. Themethod can also comprise transmitting, by the network device, anindication of the modulation scheme via a downlink control channeltransmission, wherein the indication of the modulation scheme comprisesan index number from a table comprising a first group of modulationschemes associated with transform precoding and a second group ofmodulation schemes not associated with the transform precoding.

In another embodiment machine-readable storage medium, comprisingexecutable instructions that, when executed by a processor of a device,facilitate performance of operations. The operations can comprisereceiving an uplink reference signal from a user equipment device. Theoperations can also comprise determining channel state information foran uplink data transmission from the user equipment device based on theuplink reference signal. The operations can also comprise selecting amodulation type for the uplink data transmission based on the channelstate information, wherein the modulation type comprises a selection oftransform precoding, modulation scheme, code rate, and spectralefficiency. The operations can also comprise transmitting an indicationof a selection of the modulation scheme via a downlink control channeltransmission, wherein the selection of the modulation scheme comprisesthe selection of an index number from a table comprising a group ofmodulation types.

As used in this disclosure, in some embodiments, the terms “component,”“system” and the like are intended to refer to, or comprise, acomputer-related entity or an entity related to an operational apparatuswith one or more specific functionalities, wherein the entity can beeither hardware, a combination of hardware and software, software, orsoftware in execution. As an example, a component may be, but is notlimited to being, a process running on a processor, a processor, anobject, an executable, a thread of execution, computer-executableinstructions, a program, and/or a computer. By way of illustration andnot limitation, both an application running on a server and the servercan be a component.

One or more components may reside within a process and/or thread ofexecution and a component may be localized on one computer and/ordistributed between two or more computers. In addition, these componentscan execute from various computer readable media having various datastructures stored thereon. The components may communicate via localand/or remote processes such as in accordance with a signal having oneor more data packets (e.g., data from one component interacting withanother component in a local system, distributed system, and/or across anetwork such as the Internet with other systems via the signal). Asanother example, a component can be an apparatus with specificfunctionality provided by mechanical parts operated by electric orelectronic circuitry, which is operated by a software application orfirmware application executed by a processor, wherein the processor canbe internal or external to the apparatus and executes at least a part ofthe software or firmware application. As yet another example, acomponent can be an apparatus that provides specific functionalitythrough electronic components without mechanical parts, the electroniccomponents can comprise a processor therein to execute software orfirmware that confers at least in part the functionality of theelectronic components. While various components have been illustrated asseparate components, it will be appreciated that multiple components canbe implemented as a single component, or a single component can beimplemented as multiple components, without departing from exampleembodiments.

Further, the various embodiments can be implemented as a method,apparatus or article of manufacture using standard programming and/orengineering techniques to produce software, firmware, hardware or anycombination thereof to control a computer to implement the disclosedsubject matter. The term “article of manufacture” as used herein isintended to encompass a computer program accessible from anycomputer-readable (or machine-readable) device or computer-readable (ormachine-readable) storage/communications media. For example, computerreadable storage media can comprise, but are not limited to, magneticstorage devices (e.g., hard disk, floppy disk, magnetic strips), opticaldisks (e.g., compact disk (CD), digital versatile disk (DVD)), smartcards, and flash memory devices (e.g., card, stick, key drive). Ofcourse, those skilled in the art will recognize many modifications canbe made to this configuration without departing from the scope or spiritof the various embodiments.

In addition, the words “example” and “exemplary” are used herein to meanserving as an instance or illustration. Any embodiment or designdescribed herein as “example” or “exemplary” is not necessarily to beconstrued as preferred or advantageous over other embodiments ordesigns. Rather, use of the word example or exemplary is intended topresent concepts in a concrete fashion. As used in this application, theterm “or” is intended to mean an inclusive “or” rather than an exclusive“or”. That is, unless specified otherwise or clear from context, “Xemploys A or B” is intended to mean any of the natural inclusivepermutations. That is, if X employs A; X employs B; or X employs both Aand B, then “X employs A or B” is satisfied under any of the foregoinginstances. In addition, the articles “a” and “an” as used in thisapplication and the appended claims should generally be construed tomean “one or more” unless specified otherwise or clear from context tobe directed to a singular form.

Moreover, terms such as “mobile device equipment,” “mobile station,”“mobile,” subscriber station,” “access terminal,” “terminal,” “handset,”“communication device,” “mobile device” (and/or terms representingsimilar terminology) can refer to a wireless device utilized by asubscriber or mobile device of a wireless communication service toreceive or convey data, control, voice, video, sound, gaming orsubstantially any data-stream or signaling-stream. The foregoing termsare utilized interchangeably herein and with reference to the relateddrawings. Likewise, the terms “access point (AP),” “Base Station (BS),”BS transceiver, BS device, cell site, cell site device, “Node B (NB),”“evolved Node B (eNode B),” “home Node B (HNB)” and the like, areutilized interchangeably in the application, and refer to a wirelessnetwork component or appliance that transmits and/or receives data,control, voice, video, sound, gaming or substantially any data-stream orsignaling-stream from one or more subscriber stations. Data andsignaling streams can be packetized or frame-based flows.

Furthermore, the terms “device,” “communication device,” “mobiledevice,” “subscriber,” “customer entity,” “consumer,” “customer entity,”“entity” and the like are employed interchangeably throughout, unlesscontext warrants particular distinctions among the terms. It should beappreciated that such terms can refer to human entities or automatedcomponents supported through artificial intelligence (e.g., a capacityto make inference based on complex mathematical formalisms), which canprovide simulated vision, sound recognition and so forth.

Embodiments described herein can be exploited in substantially anywireless communication technology, comprising, but not limited to,wireless fidelity (Wi-Fi), global system for mobile communications(GSM), universal mobile telecommunications system (UMTS), worldwideinteroperability for microwave access (WiMAX), enhanced general packetradio service (enhanced GPRS), third generation partnership project(3GPP) long term evolution (LTE), third generation partnership project 2(3GPP2) ultra mobile broadband (UMB), high speed packet access (HSPA),Z-Wave, Zigbee and other 802.XX wireless technologies and/or legacytelecommunication technologies.

FIG. 1 illustrates an example wireless communication system 100 inaccordance with various aspects and embodiments of the subjectdisclosure. In one or more embodiments, system 100 can comprise one ormore user equipment UEs 104 and 102, which can have one or more antennapanels having vertical and horizontal elements. A UE 102 can be a mobiledevice such as a cellular phone, a smartphone, a tablet computer, awearable device, a virtual reality (VR) device, a heads-up display (HUD)device, a smart car, a machine-type communication (MTC) device, and thelike. UE 102 can also refer to any type of wireless device thatcommunicates with a radio network node in a cellular or mobilecommunication system. Examples of UE 102 are target device, device todevice (D2D) UE, machine type UE or UE capable of machine to machine(M2M) communication, PDA, Tablet, mobile terminals, smart phone, laptopembedded equipped (LEE), laptop mounted equipment (LME), USB donglesetc. User equipment UE 102 can also comprise IOT devices thatcommunicate wirelessly. In various embodiments, system 100 is orcomprises a wireless communication network serviced by one or morewireless communication network providers. In example embodiments, a UE102 can be communicatively coupled to the wireless communication networkvia a network node 106.

The non-limiting term network node (or radio network node) is usedherein to refer to any type of network node serving a UE 102 and UE 104and/or connected to other network node, network element, or anothernetwork node from which the UE 102 or 104 can receive a radio signal.Network nodes can also have multiple antennas for performing varioustransmission operations (e.g., MIMO operations). A network node can havea cabinet and other protected enclosures, an antenna mast, and actualantennas. Network nodes can serve several cells, also called sectors,depending on the configuration and type of antenna. Examples of networknodes (e.g., network node 106) can comprise but are not limited to:NodeB devices, base station (BS) devices, access point (AP) devices, andradio access network (RAN) devices. The network node 106 can alsocomprise multi-standard radio (MSR) radio node devices, including butnot limited to: an MSR BS, an eNode B, a network controller, a radionetwork controller (RNC), a base station controller (BSC), a relay, adonor node controlling relay, a base transceiver station (BTS), atransmission point, a transmission node, an RRU, an RRH, nodes indistributed antenna system (DAS), and the like. In 5G terminology, thenode 106 can be referred to as a gNodeB device.

Wireless communication system 100 can employ various cellulartechnologies and modulation schemes to facilitate wireless radiocommunications between devices (e.g., the UE 102 and 104 and the networknode 106). For example, system 100 can operate in accordance with aUMTS, long term evolution (LTE), high speed packet access (HSPA), codedivision multiple access (CDMA), time division multiple access (TDMA),frequency division multiple access (FDMA), multi-carrier code divisionmultiple access (MC-CDMA), single-carrier code division multiple access(SC-CDMA), single-carrier FDMA (SC-FDMA), OFDM, (DFT)-spread OFDM orSC-FDMA)), FBMC, ZT DFT-s-OFDM, GFDM, UFMC, UW DFT-Spread-OFDM, UW-OFDM,CP-OFDM, resource-block-filtered OFDM, and UFMC. However, variousfeatures and functionalities of system 100 are particularly describedwherein the devices (e.g., the UEs 102 and 104 and the network device106) of system 100 are configured to communicate wireless signals usingone or more multi carrier modulation schemes, wherein data symbols canbe transmitted simultaneously over multiple frequency subcarriers (e.g.,OFDM, CP-OFDM, DFT-spread OFMD, UFMC, FMBC, etc.).

In various embodiments, system 100 can be configured to provide andemploy 5G wireless networking features and functionalities. 5G wirelesscommunication networks are expected to fulfill the demand ofexponentially increasing data traffic and to allow people and machinesto enjoy gigabit data rates with virtually zero latency. Compared to 4G,5G supports more diverse traffic scenarios. For example, in addition tothe various types of data communication between conventional UEs (e.g.,phones, smartphones, tablets, PCs, televisions, Internet enabledtelevisions, etc.) supported by 4G networks, 5G networks can be employedto support data communication between smart cars in association withdriverless car environments, as well as machine type communications(MTCs).

In an embodiment, network node 106 can receive reference signal from UE104 or 102, and then based on the reference signals, determine channelstate information for an uplink transmission from UE 102 or UE 104 tothe network node 106. The network node 106 can then select a modulationscheme for the uplink transmission based on the channel stateinformation and associated signal to noise ratio. The network device canthen send an indication of the selection to the user equipment deviceusing an index number comprising six bits that correspond to an indexnumber in a table of modulation schemes. The table of modulation schemescan include modulation schemes that use transform precoding, as well asmodulation schemes that do not use transform precoding.

In an embodiment, the uplink transmission can be a multiantennatransmission of up to 4 antenna ports. The antenna or the layer mappingin general, can be described as a mapping from the output of the datamodulation to the different antenna ports. The input to the antennamapping thus consists of the modulation symbols (QPSK, 16QAM, 64QAM,256QAM) corresponding to the transport block. The output of the antennamapping is a set of symbols for each antenna port. The symbols of eachantenna port are subsequently applied to the OFDM modulator—that is,mapped to the basic OFDM time-frequency grid corresponding to thatantenna port.

In some embodiments, before the layer mapping is performed, and afterthe modulation mapping, the encoded symbols are passed through thetransform precoder. For example, FFT (Fast Fourier Transform) can beused as a transform precoder. The main advantage of this scheme is thereduced peak average power ratio (PAPR) thereby improving the coverageof the systems.

The reference signals that the UE 104 and UE 102 send can be uplinkreference signals that are predefined signals occupying specificresource elements within the uplink time-frequency grid. In anembodiment, the uplink reference signals can be UE specific referencesignals. In an embodiment, there can be two types of uplink referencesignals that are transmitted in different ways and used for differentpurposes by the network node 106. 1) Sounding reference signals (SRS):These reference signals are specifically intended to be used by networknode 106 to acquire channel-state information (CSI) and beam specificinformation. In 5G systems, the SRS is UE specific so it can have asignificantly lower time/frequency density. 2) Demodulation referencesignals (DM-RS): These reference signals are specifically intended to beused by the gNB for channel estimation for data channel between thenetwork node 106 and the UE 102 or 104. The label “UE-specific” relatesto the fact that each demodulation reference signal is intended forchannel estimation by the network node 106 from a specific UE (e.g., UE102 or 104). That specific reference signal is then only transmittedwithin the resource blocks assigned for data traffic channeltransmission to that terminal. Since in general the data is precoded,the DM-RDS can also be precoded with the same precoding as that of data.

Table 1 shows the supported modulation schemes for uplink datatransmission if transform precoding is applied or not. Observe that thenumber of modulation schemes are 4 when transform precoding is notapplied and is equal to 5 when transform precoding is applied.

TABLE 1 Supported modulation schemes: Transform precoding Transformprecoding disabled enabled π/2-BPSK QPSK QPSK 16QAM 16QAM 64QAM 64QAM256QAM  256QAM 

There can be various code rates with different spectral efficiencies foreach of the sets of modulation schemes, with transform precodingdisabled or enabled.

In traditional systems, the network node 106 would indicate to the UE104 or 102 over RRC signaling whether transform precoding was enabled ornot, and then select an index number from two separate tables or datastructures indicating which modulation scheme to use.

A first modulation and coding (MCS) table when transform precoding isnot enabled is shown in Table 2, and then a second MCS table whentransform precoding is enabled is shown in Table 3.

TABLE 2 MCS Modulation Code Spe. Index order rate Eff. 0 2  1/32 0.06 12  1/16 0.13 2 2 1/8 0.25 3 2  3/16 0.38 4 2 1/4 0.50 5 2  5/16 0.63 6 23/8 0.75 7 2  7/16 0.88 8 2 1/2 1.00 9 2  9/16 1.13 10 2 5/8 1.25 11 43/8 1.50 12 4  7/16 1.75 13 4 1/2 2.00 14 4  9/16 2.25 15 4 5/8 2.50 164 11/16 2.75 17 4 3/4 3.00 18 6  9/16 3.38 19 6 5/8 3.75 20 6 11/16 4.1321 6 3/4 4.50 22 6 13/16 4.88 23 6 7/8 5.25 24 8 11/16 5.50 25 8 3/46.00 26 8 13/16 6.50 27 8 7/8 7.00 28 8 15/16 7.50 Reserved 2 4 6

TABLE 3 MCS Modulation Code Spe. Index order rate Eff. 0 2  1/32 0.06 12  1/16 0.13 2 2 1/8 0.25 3 1 1/8 0.13 4 2 1/4 0.50 5 2  5/16 0.63 6 23/8 0.75 7 2  7/16 0.88 8 2 1/2 1.00 9 1 1/4 0.25 10 2 5/8 1.25 11 4 3/81.50 12 4  7/16 1.75 13 4 1/2 2.00 14 4  9/16 2.25 15 4 5/8 2.50 16 411/16 2.75 17 4 3/4 3.00 18 6  9/16 3.38 19 6 5/8 3.75 20 6 11/16 4.1321 6 3/4 4.50 22 6 13/16 4.88 23 6 7/8 5.25 24 8 11/16 5.50 25 8 3/46.00 26 8 13/16 6.50 27 8 7/8 7.00 28 8 15/16 7.50 Reserved 2 4 6

In each of these embodiments, as there are 28 different modulation andcoding schemes, 5 bits can be used to communicate the index selection,but the transform precoding indicator is sent during RRC signaling.

However, it can be observed that the scheme is not efficient as theresolution of the code rates for lower modulation scheme (modulationorder is 1) is very low. This is because 5 bits are used for Table 2afor 4 modulation schemes and 5 bits are used in Table 2b for 5modulation schemes. Hence the code rate resolution is different forthese two tables and results in inefficient use of lower ordermodulation schemes such AS π/2-BPSK. This modulation schemes can be usedfor coverage improvement as the power amplifier can be driven with fullpower. This is because with π/2-BPSK, the out of band leakages can beminimized as π/2-BPSK avoids phase change of 180 degrees in successivebits there driving the power amplifier with full power.

In the current disclosure however, the two tables can be merged, with afirst group of MCS entries that correspond to transform precoding, and asecond group of MCS entries that are associated with transform precodingdisabled modulation schemes. This can avoid having to wait for RRCsignaling before changing whether transform precoding is enabled or not,and lets the network node 106 and UE 102 and 104 more dynamically adjustmodulation schemes in response to changing SNR ratios and channel stateinformation. Table 4 provides the MCS index table provided for in thisdisclosure.

TABLE 4 MCS Waveform Modulation Code Spe. Index selection order rateEff. 0 1 1  1/32 0.06 1 1 1  1/16 0.13 2 1 1 1/8 0.25 3 1 1 1/8 0.13 4 12 1/4 0.50 5 1 2  5/16 0.63 6 1 2 3/8 0.75 7 1 2  7/16 0.88 8 1 2 1/21.00 9 1 2 1/4 0.25 10 1 2 5/8 1.25 11 1 4 3/8 1.50 12 1 4  7/16 1.75 131 4 1/2 2.00 14 1 4  9/16 2.25 15 1 4 5/8 2.50 16 1 4 11/16 2.75 17 1 43/4 3.00 18 1 6  9/16 3.38 19 1 6 5/8 3.75 20 6 11/16 4.13 21 1 6 3/44.50 22 1 6 13/16 4.88 23 1 6 7/8 5.25 24 1 8 11/16 5.50 25 1 8 3/4 6.0026 1 8 13/16 6.50 27 1 8 7/8 7.00 28 1 8 15/16 7.50 29 1 reserved 30 131 1 32 1 2  1/32 0.06 33 0 2  1/16 0.13 34 0 2 1/8 0.25 35 0 2  3/160.38 36 0 2 1/4 0.50 37 0 2  5/16 0.63 38 0 2 3/8 0.75 39 0 2  7/16 0.8840 0 2 1/2 1.00 41 0 2  9/16 1.13 42 0 2 5/8 1.25 43 0 4 3/8 1.50 44 0 4 7/16 1.75 45 0 4 1/2 2.00 46 0 4  9/16 2.25 47 0 4 5/8 2.50 48 0 411/16 2.75 49 0 4 3/4 3.00 50 0 6  9/16 3.38 51 0 6 5/8 3.75 52 0 611/16 4.13 53 0 6 3/4 4.50 54 0 6 13/16 4.88 55 0 6 7/8 5.25 56 0 811/16 5.50 57 0 8 3/4 6.00 58 0 8 13/16 6.50 59 0 8 7/8 7.00 60 0 815/16 7.50 61 0 Reserved 62 0 63 0 64 0

Using this technique, a total of 6 bits can be used to indicate the MCSindex number and associated modulation and coding scheme selected by thenetwork node 106. When the UE 102 or 104 receive the MCS index in thedownlink control channel information, the can modulate and encode theuplink data transmission in accordance with the selected modulation andcoding scheme.

As show in Table 4, with 6 bits of joint encoding of MCS and waveformselection (transform precoding enabled or disabled), we can add moreentries for lower modulation schemes (π/2 BPSK) as well as higher ordermodulation schemes such as 256-QAM with enough granularity in code rate.Hence with the above approach, the coverage limited UE can use lowerorder modulations as well as high data demanding UE can use the same 6bits for higher order modulations with high code rate. Hence with thisapproach we can improve the system capacity as well as the coverage ofNR at same time.

Turning now to FIG. 2, illustrated is an example block diagram showing amessage sequence chart in accordance with various aspects andembodiments of the subject disclosure.

In an embodiment, a UE device 202 can send an UE specific soundingreference signal 206 to network node/gNB 204. In an embodiment, theresounding reference signal can be two types of uplink reference signalsthat are transmitted in different ways and used for different purposesby the gNB 204. 1) Sounding reference signals (SRS): These referencesignals are specifically intended to be used by gNB 204 to acquirechannel-state information (CSI) and beam specific information. In 5Gsystems, the SRS is UE specific so it can have a significantly lowertime/frequency density. 2) Demodulation reference signals (DM-RS): Thesereference signals are specifically intended to be used by the gNB forchannel estimation for data channel between the gNB 204 and the UE 202.The label “UE-specific” relates to the fact that each demodulationreference signal is intended for channel estimation by the network node106 from a specific UE. That specific reference signal is then onlytransmitted within the resource blocks assigned for data traffic channeltransmission to that terminal. Since in general the data is precoded,the DM-RDS can also be precoded with the same precoding as that of data.

At 208, the gNB 204 can compute the CSI and determine parameters for theuplink data transmission. The determination step consists for examplecomputing channel quality indicator (CQI) and/or modulation and codingscheme (MCS), Transmit precoding matrix index (TPMI), and Transmit rankinformation (TRI), etc. In the determination step, the gNB 204 canselect which modulation and coding scheme to use from Table 4, and thensend an indication of the index number to the UE 202 via downlinkcontrol channel transmission 210. When the UE 202 sends the uplink datatransmission, the UE 202 can use the selected modulation and codingscheme indicated by the gNB 204. If the channel state informationchanges, e.g., lower coverage due to the UE 202 being further away, moreinterference, etc., the gNB 204 can determine the channel stateinformation for a new transmission from the UE reference signals, andselect a new MCS index number and transmit the selection via thedownlink control channel 210 without needing to wait for RRC signalingto indicate a change in the transform precoding status.

In an embodiment, if the SNR is below a certain level (e.g., a definedthreshold), indicating low coverage, the gNB 204 can indicate that atransform precoding enabled modulation scheme is selected, but then ifthe SNR goes above the defined threshold, the gNB 204 can signal that atransform precoding disabled modulation scheme should be used, allwithout RRC signaling.

Turning now to FIG. 3, illustrated is an example block diagram showing atraditional modulation scheme indication system 300. In this system,during RRC signaling 302, the network node can signal to the UE that amodulation scheme will be either transform precoding enabled or disabledvia bit indicator 306. Then, during a downlink control channel 304, thenetwork node can indicate via 5 bits 308 which modulation scheme isselected, (e.g., via a selection from Tables 2 or 3 depending on whethertransform precoding is enabled). By contrast, in FIG. 4, which depictsan exemplary embodiment of the subject application, RRC signaling 402does not indicate whether transform precoding is enabled or not, butinstead the indication of the selection is sent via 6 bits 406 indownlink control channel information 404 (e.g., via a selection fromTable 4).

Turning now to FIG. 5, illustrated is an example block diagram 500 of anetwork device 502 configured to select and convey a selection of amodulation scheme in accordance with various aspects and embodiments ofthe subject disclosure.

Network device 502 can include a channel state information component 504that determine channel state information for an uplink data transmissionbased on an uplink reference signal received by a transceiver component510 from a UE device. The reference signal can be either 1) Soundingreference signals (SRS): These reference signals are specificallyintended to be used by the network device 502 to acquire channel-stateinformation (CSI) and beam specific information. In 5G systems, the SRSis UE specific so it can have a significantly lower time/frequencydensity. 2) Demodulation reference signals (DM-RS): These referencesignals are specifically intended to be used by the network device 502for channel estimation for data channel between the network device 502and the UE. The label “UE-specific” relates to the fact that eachdemodulation reference signal is intended for channel estimation by thenetwork device 502 from a specific UE. That specific reference signal isthen only transmitted within the resource blocks assigned for datatraffic channel transmission to that terminal. Since in general the datais precoded, the DM-RDS can also be precoded with the same precoding asthat of data.

The modulation selection component 506 can select a modulation schemefor the uplink data transmission based on the channel state informationand from one of modulation and coding schemes in Table 4, and thenindication component 508 can indicate via the 6 bits 406 in the downlinkcontrol channel information block the MCS index number associated withthe modulation and coding scheme selected from Table 4. Transceivercomponent 510 can then facilitate transmitting a selection of themodulation scheme on a downlink control channel transmission, whereinthe selection of the modulation scheme comprises an index number from adata structure comprising a first group of transform precoding enabledmodulation schemes and a second group of transform precoding disabledmodulation schemes.

FIGS. 6-8 illustrates a process in connection with the aforementionedsystems. The processes in FIGS. 6-8 can be implemented for example bythe systems in FIGS. 1-5 respectively. While for purposes of simplicityof explanation, the methods are shown and described as a series ofblocks, it is to be understood and appreciated that the claimed subjectmatter is not limited by the order of the blocks, as some blocks mayoccur in different orders and/or concurrently with other blocks fromwhat is depicted and described herein. Moreover, not all illustratedblocks may be required to implement the methods described hereinafter.

FIG. 6 illustrates an example flowchart indicating decision tree forselecting and conveying modulation scheme information in accordance withvarious aspects and embodiments of the subject disclosure.

At 602 the system can receive reference signals from a UE, and thenbased on the reference signals determine channel state information forthe uplink channel. If a SNR 604 associated with the channel stateinformation is above a threshold, then at 606, the system can select atransform precoding disabled modulation scheme, whereas at 608, if theSNR is below the threshold, the system can select a transform precodingenabled modulation scheme. At 610, the system can transmit theindication (e.g., 6 bit index number of the selection from, e.g., MCSTable 4) to the UE device.

FIG. 7 illustrates an example method 700 for selecting and conveyingmodulation scheme information in accordance with various aspects andembodiments of the subject disclosure.

Method 700 can begin at 702 where the method includes determiningchannel state information for an uplink data transmission based on anuplink reference signal.

At 704, the method includes selecting a modulation scheme for the uplinkdata transmission based on the channel state information.

At 706, the method includes facilitating transmitting a selection of themodulation scheme on a downlink control channel transmission, whereinthe selection of the modulation scheme comprises an index number from adata structure comprising a first group of transform precoding enabledmodulation schemes and a second group of transform precoding disabledmodulation schemes.

FIG. 8 illustrates an example method 800 for selecting and conveyingmodulation scheme information in accordance with various aspects andembodiments of the subject disclosure.

Method 800 can begin at 802 wherein the method includes determining, bya network device comprising a processor, a signal to noise ratioassociated with an uplink data transmission based on an uplink referencesignal.

At 804, the method can include selecting, by the network device, amodulation scheme for the uplink data transmission based on the signalto noise ratio.

At 806, the method can include transmitting, by the network device, anindication of the modulation scheme via a downlink control channeltransmission, wherein the indication of the modulation scheme comprisesan index number from a table comprising a first group of modulationschemes associated with transform precoding and a second group ofmodulation schemes not associated with the transform precoding.

Referring now to FIG. 9, illustrated is a schematic block diagram of anexample end-user device such as a user equipment) that can be a mobiledevice 900 capable of connecting to a network in accordance with someembodiments described herein. Although a mobile handset 900 isillustrated herein, it will be understood that other devices can be amobile device, and that the mobile handset 900 is merely illustrated toprovide context for the embodiments of the various embodiments describedherein. The following discussion is intended to provide a brief, generaldescription of an example of a suitable environment 900 in which thevarious embodiments can be implemented. While the description includes ageneral context of computer-executable instructions embodied on amachine-readable storage medium, those skilled in the art will recognizethat the various embodiments also can be implemented in combination withother program modules and/or as a combination of hardware and software.

Generally, applications (e.g., program modules) can include routines,programs, components, data structures, etc., that perform particulartasks or implement particular abstract data types. Moreover, thoseskilled in the art will appreciate that the methods described herein canbe practiced with other system configurations, includingsingle-processor or multiprocessor systems, minicomputers, mainframecomputers, as well as personal computers, hand-held computing devices,microprocessor-based or programmable consumer electronics, and the like,each of which can be operatively coupled to one or more associateddevices.

A computing device can typically include a variety of machine-readablemedia. Machine-readable media can be any available media that can beaccessed by the computer and includes both volatile and non-volatilemedia, removable and non-removable media. By way of example and notlimitation, computer-readable media can comprise computer storage mediaand communication media. Computer storage media can include volatileand/or non-volatile media, removable and/or non-removable mediaimplemented in any method or technology for storage of information, suchas computer-readable instructions, data structures, program modules orother data. Computer storage media can include, but is not limited to,RAM, ROM, EEPROM, flash memory or other memory technology, CD ROM,digital video disk (DVD) or other optical disk storage, magneticcassettes, magnetic tape, magnetic disk storage or other magneticstorage devices, or any other medium which can be used to store thedesired information and which can be accessed by the computer.

Communication media typically embodies computer-readable instructions,data structures, program modules or other data in a modulated datasignal such as a carrier wave or other transport mechanism, and includesany information delivery media. The term “modulated data signal” means asignal that has one or more of its characteristics set or changed insuch a manner as to encode information in the signal. By way of example,and not limitation, communication media includes wired media such as awired network or direct-wired connection, and wireless media such asacoustic, RF, infrared and other wireless media. Combinations of the anyof the above should also be included within the scope ofcomputer-readable media.

The handset 900 includes a processor 902 for controlling and processingall onboard operations and functions. A memory 904 interfaces to theprocessor 902 for storage of data and one or more applications 906(e.g., a video player software, user feedback component software, etc.).Other applications can include voice recognition of predetermined voicecommands that facilitate initiation of the user feedback signals. Theapplications 906 can be stored in the memory 904 and/or in a firmware908, and executed by the processor 902 from either or both the memory904 or/and the firmware 908. The firmware 908 can also store startupcode for execution in initializing the handset 900. A communicationscomponent 910 interfaces to the processor 902 to facilitatewired/wireless communication with external systems, e.g., cellularnetworks, VoIP networks, and so on. Here, the communications component910 can also include a suitable cellular transceiver 911 (e.g., a GSMtransceiver) and/or an unlicensed transceiver 913 (e.g., Wi-Fi, WiMax)for corresponding signal communications. The handset 900 can be a devicesuch as a cellular telephone, a PDA with mobile communicationscapabilities, and messaging-centric devices. The communicationscomponent 910 also facilitates communications reception from terrestrialradio networks (e.g., broadcast), digital satellite radio networks, andInternet-based radio services networks.

The handset 900 includes a display 912 for displaying text, images,video, telephony functions (e.g., a Caller ID function), setupfunctions, and for user input. For example, the display 912 can also bereferred to as a “screen” that can accommodate the presentation ofmultimedia content (e.g., music metadata, messages, wallpaper, graphics,etc.). The display 912 can also display videos and can facilitate thegeneration, editing and sharing of video quotes. A serial I/O interface914 is provided in communication with the processor 902 to facilitatewired and/or wireless serial communications (e.g., USB, and/or IEEE1394) through a hardwire connection, and other serial input devices(e.g., a keyboard, keypad, and mouse). This supports updating andtroubleshooting the handset 900, for example. Audio capabilities areprovided with an audio I/O component 916, which can include a speakerfor the output of audio signals related to, for example, indication thatthe user pressed the proper key or key combination to initiate the userfeedback signal. The audio I/O component 916 also facilitates the inputof audio signals through a microphone to record data and/or telephonyvoice data, and for inputting voice signals for telephone conversations.

The handset 900 can include a slot interface 918 for accommodating a SIC(Subscriber Identity Component) in the form factor of a card SubscriberIdentity Module (SIM) or universal SIM 920, and interfacing the SIM card920 with the processor 902. However, it is to be appreciated that theSIM card 920 can be manufactured into the handset 900, and updated bydownloading data and software.

The handset 900 can process IP data traffic through the communicationcomponent 910 to accommodate IP traffic from an IP network such as, forexample, the Internet, a corporate intranet, a home network, a personarea network, etc., through an ISP or broadband cable provider. Thus,VoIP traffic can be utilized by the handset 800 and IP-based multimediacontent can be received in either an encoded or decoded format.

A video processing component 922 (e.g., a camera) can be provided fordecoding encoded multimedia content. The video processing component 922can aid in facilitating the generation, editing and sharing of videoquotes. The handset 900 also includes a power source 924 in the form ofbatteries and/or an AC power subsystem, which power source 924 caninterface to an external power system or charging equipment (not shown)by a power I/O component 926.

The handset 900 can also include a video component 930 for processingvideo content received and, for recording and transmitting videocontent. For example, the video component 930 can facilitate thegeneration, editing and sharing of video quotes. A location trackingcomponent 932 facilitates geographically locating the handset 900. Asdescribed hereinabove, this can occur when the user initiates thefeedback signal automatically or manually. A user input component 934facilitates the user initiating the quality feedback signal. The userinput component 934 can also facilitate the generation, editing andsharing of video quotes. The user input component 934 can include suchconventional input device technologies such as a keypad, keyboard,mouse, stylus pen, and/or touch screen, for example.

Referring again to the applications 906, a hysteresis component 936facilitates the analysis and processing of hysteresis data, which isutilized to determine when to associate with the access point. Asoftware trigger component 938 can be provided that facilitatestriggering of the hysteresis component 938 when the Wi-Fi transceiver913 detects the beacon of the access point. A SIP client 940 enables thehandset 900 to support SIP protocols and register the subscriber withthe SIP registrar server. The applications 906 can also include a client942 that provides at least the capability of discovery, play and storeof multimedia content, for example, music.

The handset 900, as indicated above related to the communicationscomponent 810, includes an indoor network radio transceiver 913 (e.g.,Wi-Fi transceiver). This function supports the indoor radio link, suchas IEEE 802.11, for the dual-mode GSM handset 900. The handset 900 canaccommodate at least satellite radio services through a handset that cancombine wireless voice and digital radio chipsets into a single handhelddevice.

Referring now to FIG. 10, there is illustrated a block diagram of acomputer 1000 operable to execute the functions and operations performedin the described example embodiments. For example, a network node (e.g.,network node 106, base station device 204, e.g.) may contain componentsas described in FIG. 10. The computer 1000 can provide networking andcommunication capabilities between a wired or wireless communicationnetwork and a server and/or communication device. In order to provideadditional context for various aspects thereof, FIG. 1 and the followingdiscussion are intended to provide a brief, general description of asuitable computing environment in which the various aspects of theembodiments can be implemented to facilitate the establishment of atransaction between an entity and a third party. While the descriptionabove is in the general context of computer-executable instructions thatcan run on one or more computers, those skilled in the art willrecognize that the various embodiments also can be implemented incombination with other program modules and/or as a combination ofhardware and software.

Generally, program modules include routines, programs, components, datastructures, etc., that perform particular tasks or implement particularabstract data types. Moreover, those skilled in the art will appreciatethat the various methods can be practiced with other computer systemconfigurations, including single-processor or multiprocessor computersystems, minicomputers, mainframe computers, as well as personalcomputers, hand-held computing devices, microprocessor-based orprogrammable consumer electronics, and the like, each of which can beoperatively coupled to one or more associated devices.

The illustrated aspects of the various embodiments can also be practicedin distributed computing environments where certain tasks are performedby remote processing devices that are linked through a communicationsnetwork. In a distributed computing environment, program modules can belocated in both local and remote memory storage devices.

Computing devices typically include a variety of media, which caninclude computer-readable storage media or communications media, whichtwo terms are used herein differently from one another as follows.

Computer-readable storage media can be any available storage media thatcan be accessed by the computer and includes both volatile andnonvolatile media, removable and non-removable media. By way of example,and not limitation, computer-readable storage media can be implementedin connection with any method or technology for storage of informationsuch as computer-readable instructions, program modules, structureddata, or unstructured data. Computer-readable storage media can include,but are not limited to, RAM, ROM, EEPROM, flash memory or other memorytechnology, CD-ROM, digital versatile disk (DVD) or other optical diskstorage, magnetic cassettes, magnetic tape, magnetic disk storage orother magnetic storage devices, or other tangible and/or non-transitorymedia which can be used to store desired information. Computer-readablestorage media can be accessed by one or more local or remote computingdevices, e.g., via access requests, queries or other data retrievalprotocols, for a variety of operations with respect to the informationstored by the medium.

Communications media can embody computer-readable instructions, datastructures, program modules or other structured or unstructured data ina data signal such as a modulated data signal, e.g., a carrier wave orother transport mechanism, and includes any information delivery ortransport media. The term “modulated data signal” or signals refers to asignal that has one or more of its characteristics set or changed insuch a manner as to encode information in one or more signals. By way ofexample, and not limitation, communication media include wired media,such as a wired network or direct-wired connection, and wireless mediasuch as acoustic, RF, infrared and other wireless media.

With reference to FIG. 10, implementing various aspects described hereinwith regards to the end-user device can include a computer 1000, thecomputer 1000 including a processing unit 1004, a system memory 1006 anda system bus 1008. The system bus 1008 couples system componentsincluding, but not limited to, the system memory 1006 to the processingunit 1004. The processing unit 1004 can be any of various commerciallyavailable processors. Dual microprocessors and other multi-processorarchitectures can also be employed as the processing unit 1004.

The system bus 1008 can be any of several types of bus structure thatcan further interconnect to a memory bus (with or without a memorycontroller), a peripheral bus, and a local bus using any of a variety ofcommercially available bus architectures. The system memory 1006includes read-only memory (ROM) 1027 and random access memory (RAM)1012. A basic input/output system (BIOS) is stored in a non-volatilememory 1027 such as ROM, EPROM, EEPROM, which BIOS contains the basicroutines that help to transfer information between elements within thecomputer 1000, such as during start-up. The RAM 1012 can also include ahigh-speed RAM such as static RAM for caching data.

The computer 1000 further includes an internal hard disk drive (HDD)1014 (e.g., EIDE, SATA), which internal hard disk drive 1014 can also beconfigured for external use in a suitable chassis (not shown), amagnetic floppy disk drive (FDD) 1016, (e.g., to read from or write to aremovable diskette 1018) and an optical disk drive 1020, (e.g., readinga CD-ROM disk 1022 or, to read from or write to other high capacityoptical media such as the DVD). The hard disk drive 1014, magnetic diskdrive 1016 and optical disk drive 1020 can be connected to the systembus 1008 by a hard disk drive interface 1024, a magnetic disk driveinterface 1026 and an optical drive interface 1028, respectively. Theinterface 1024 for external drive implementations includes at least oneor both of Universal Serial Bus (USB) and IEEE 1394 interfacetechnologies. Other external drive connection technologies are withincontemplation of the subject embodiments.

The drives and their associated computer-readable media providenonvolatile storage of data, data structures, computer-executableinstructions, and so forth. For the computer 1000 the drives and mediaaccommodate the storage of any data in a suitable digital format.Although the description of computer-readable media above refers to aHDD, a removable magnetic diskette, and a removable optical media suchas a CD or DVD, it should be appreciated by those skilled in the artthat other types of media which are readable by a computer 1000, such aszip drives, magnetic cassettes, flash memory cards, cartridges, and thelike, can also be used in the example operating environment, andfurther, that any such media can contain computer-executableinstructions for performing the methods of the disclosed embodiments.

A number of program modules can be stored in the drives and RAM 1012,including an operating system 1030, one or more application programs1032, other program modules 1034 and program data 1036. All or portionsof the operating system, applications, modules, and/or data can also becached in the RAM 1012. It is to be appreciated that the variousembodiments can be implemented with various commercially availableoperating systems or combinations of operating systems.

A user can enter commands and information into the computer 1000 throughone or more wired/wireless input devices, e.g., a keyboard 1038 and apointing device, such as a mouse 1040. Other input devices (not shown)may include a microphone, an IR remote control, a joystick, a game pad,a stylus pen, touch screen, or the like. These and other input devicesare often connected to the processing unit 1004 through an input deviceinterface 1042 that is coupled to the system bus 1008, but can beconnected by other interfaces, such as a parallel port, an IEEE 1394serial port, a game port, a USB port, an IR interface, etc.

A monitor 1044 or other type of display device is also connected to thesystem bus 1008 through an interface, such as a video adapter 1046. Inaddition to the monitor 1044, a computer 1000 typically includes otherperipheral output devices (not shown), such as speakers, printers, etc.

The computer 1000 can operate in a networked environment using logicalconnections by wired and/or wireless communications to one or moreremote computers, such as a remote computer(s) 1048. The remotecomputer(s) 1048 can be a workstation, a server computer, a router, apersonal computer, portable computer, microprocessor-based entertainmentdevice, a peer device or other common network node, and typicallyincludes many or all of the elements described relative to the computer,although, for purposes of brevity, only a memory/storage device 1050 isillustrated. The logical connections depicted include wired/wirelessconnectivity to a local area network (LAN) 1052 and/or larger networks,e.g., a wide area network (WAN) 1054. Such LAN and WAN networkingenvironments are commonplace in offices and companies, and facilitateenterprise-wide computer networks, such as intranets, all of which mayconnect to a global communications network, e.g., the Internet.

When used in a LAN networking environment, the computer 1000 isconnected to the local network 1052 through a wired and/or wirelesscommunication network interface or adapter 1056. The adapter 1056 mayfacilitate wired or wireless communication to the LAN 1052, which mayalso include a wireless access point disposed thereon for communicatingwith the wireless adapter 1056.

When used in a WAN networking environment, the computer 1000 can includea modem 1058, or is connected to a communications server on the WAN1054, or has other means for establishing communications over the WAN1054, such as by way of the Internet. The modem 1058, which can beinternal or external and a wired or wireless device, is connected to thesystem bus 1008 through the input device interface 1042. In a networkedenvironment, program modules depicted relative to the computer, orportions thereof, can be stored in the remote memory/storage device1050. It will be appreciated that the network connections shown areexemplary and other means of establishing a communications link betweenthe computers can be used.

The computer is operable to communicate with any wireless devices orentities operatively disposed in wireless communication, e.g., aprinter, scanner, desktop and/or portable computer, portable dataassistant, communications satellite, any piece of equipment or locationassociated with a wirelessly detectable tag (e.g., a kiosk, news stand,restroom), and telephone. This includes at least Wi-Fi and Bluetooth™wireless technologies. Thus, the communication can be a predefinedstructure as with a conventional network or simply an ad hoccommunication between at least two devices.

Wi-Fi, or Wireless Fidelity, allows connection to the Internet from acouch at home, a bed in a hotel room, or a conference room at work,without wires. Wi-Fi is a wireless technology similar to that used in acell phone that enables such devices, e.g., computers, to send andreceive data indoors and out; anywhere within the range of a basestation. Wi-Fi networks use radio technologies called IEEE802.11 (a, b,g, n, etc.) to provide secure, reliable, fast wireless connectivity. AWi-Fi network can be used to connect computers to each other, to theInternet, and to wired networks (which use IEEE802.3 or Ethernet). Wi-Finetworks operate in the unlicensed 2.4 and 5 GHz radio bands, at an 11Mbps (802.11b) or 54 Mbps (802.11a) data rate, for example, or withproducts that contain both bands (dual band), so the networks canprovide real-world performance similar to the basic “10BaseT” wiredEthernet networks used in many offices.

As used in this application, the terms “system,” “component,”“interface,” and the like are generally intended to refer to acomputer-related entity or an entity related to an operational machinewith one or more specific functionalities. The entities disclosed hereincan be either hardware, a combination of hardware and software,software, or software in execution. For example, a component may be, butis not limited to being, a process running on a processor, a processor,an object, an executable, a thread of execution, a program, and/or acomputer. By way of illustration, both an application running on aserver and the server can be a component. One or more components mayreside within a process and/or thread of execution and a component maybe localized on one computer and/or distributed between two or morecomputers. These components also can execute from various computerreadable storage media having various data structures stored thereon.The components may communicate via local and/or remote processes such asin accordance with a signal having one or more data packets (e.g., datafrom one component interacting with another component in a local system,distributed system, and/or across a network such as the Internet withother systems via the signal). As another example, a component can be anapparatus with specific functionality provided by mechanical partsoperated by electric or electronic circuitry that is operated bysoftware or firmware application(s) executed by a processor, wherein theprocessor can be internal or external to the apparatus and executes atleast a part of the software or firmware application. As yet anotherexample, a component can be an apparatus that provides specificfunctionality through electronic components without mechanical parts,the electronic components can comprise a processor therein to executesoftware or firmware that confers at least in part the functionality ofthe electronic components. An interface can comprise input/output (I/O)components as well as associated processor, application, and/or APIcomponents.

Furthermore, the disclosed subject matter may be implemented as amethod, apparatus, or article of manufacture using standard programmingand/or engineering techniques to produce software, firmware, hardware,or any combination thereof to control a computer to implement thedisclosed subject matter. The term “article of manufacture” as usedherein is intended to encompass a computer program accessible from anycomputer-readable device, computer-readable carrier, orcomputer-readable media. For example, computer-readable media caninclude, but are not limited to, a magnetic storage device, e.g., harddisk; floppy disk; magnetic strip(s); an optical disk (e.g., compactdisk (CD), a digital video disc (DVD), a Blu-ray Disc™ (BD)); a smartcard; a flash memory device (e.g., card, stick, key drive); and/or avirtual device that emulates a storage device and/or any of the abovecomputer-readable media.

As it employed in the subject specification, the term “processor” canrefer to substantially any computing processing unit or devicecomprising, but not limited to comprising, single-core processors;single-processors with software multithread execution capability;multi-core processors; multi-core processors with software multithreadexecution capability; multi-core processors with hardware multithreadtechnology; parallel platforms; and parallel platforms with distributedshared memory. Additionally, a processor can refer to an integratedcircuit, an application specific integrated circuit (ASIC), a digitalsignal processor (DSP), a field programmable gate array (FPGA), aprogrammable logic controller (PLC), a complex programmable logic device(CPLD), a discrete gate or transistor logic, discrete hardwarecomponents, or any combination thereof designed to perform the functionsdescribed herein. Processors can exploit nano-scale architectures suchas, but not limited to, molecular and quantum-dot based transistors,switches and gates, in order to optimize space usage or enhanceperformance of user equipment. A processor also can be implemented as acombination of computing processing units.

In the subject specification, terms such as “store,” “data store,” “datastorage,” “database,” “repository,” “queue”, and substantially any otherinformation storage component relevant to operation and functionality ofa component, refer to “memory components,” or entities embodied in a“memory” or components comprising the memory. It will be appreciatedthat the memory components described herein can be either volatilememory or nonvolatile memory, or can comprise both volatile andnonvolatile memory. In addition, memory components or memory elementscan be removable or stationary. Moreover, memory can be internal orexternal to a device or component, or removable or stationary. Memorycan comprise various types of media that are readable by a computer,such as hard-disc drives, zip drives, magnetic cassettes, flash memorycards or other types of memory cards, cartridges, or the like.

By way of illustration, and not limitation, nonvolatile memory cancomprise read only memory (ROM), programmable ROM (PROM), electricallyprogrammable ROM (EPROM), electrically erasable ROM (EEPROM), or flashmemory. Volatile memory can comprise random access memory (RAM), whichacts as external cache memory. By way of illustration and notlimitation, RAM is available in many forms such as synchronous RAM(SRAM), dynamic RAM (DRAM), synchronous DRAM (SDRAM), double data rateSDRAM (DDR SDRAM), enhanced SDRAM (ESDRAM), Synchlink DRAM (SLDRAM), anddirect Rambus RAM (DRRAM). Additionally, the disclosed memory componentsof systems or methods herein are intended to comprise, without beinglimited to comprising, these and any other suitable types of memory.

In particular and in regard to the various functions performed by theabove described components, devices, circuits, systems and the like, theterms (including a reference to a “means”) used to describe suchcomponents are intended to correspond, unless otherwise indicated, toany component which performs the specified function of the describedcomponent (e.g., a functional equivalent), even though not structurallyequivalent to the disclosed structure, which performs the function inthe herein illustrated example aspects of the embodiments. In thisregard, it will also be recognized that the embodiments comprise asystem as well as a computer-readable medium having computer-executableinstructions for performing the acts and/or events of the variousmethods.

Computing devices typically comprise a variety of media, which cancomprise computer-readable storage media and/or communications media,which two terms are used herein differently from one another as follows.Computer-readable storage media can be any available storage media thatcan be accessed by the computer and comprises both volatile andnonvolatile media, removable and non-removable media. By way of example,and not limitation, computer-readable storage media can be implementedin connection with any method or technology for storage of informationsuch as computer-readable instructions, program modules, structureddata, or unstructured data.

Computer-readable storage media can include, but are not limited to,random access memory (RAM), read only memory (ROM), electricallyerasable programmable read only memory (EEPROM), flash memory or othermemory technology, solid state drive (SSD) or other solid-state storagetechnology, compact disk read only memory (CD ROM), digital versatiledisk (DVD), Blu-ray disc or other optical disk storage, magneticcassettes, magnetic tape, magnetic disk storage or other magneticstorage devices or other tangible and/or non-transitory media which canbe used to store desired information.

In this regard, the terms “tangible” or “non-transitory” herein asapplied to storage, memory or computer-readable media, are to beunderstood to exclude only propagating transitory signals per se asmodifiers and do not relinquish rights to all standard storage, memoryor computer-readable media that are not only propagating transitorysignals per se. Computer-readable storage media can be accessed by oneor more local or remote computing devices, e.g., via access requests,queries or other data retrieval protocols, for a variety of operationswith respect to the information stored by the medium.

On the other hand, communications media typically embodycomputer-readable instructions, data structures, program modules orother structured or unstructured data in a data signal such as amodulated data signal, e.g., a carrier wave or other transportmechanism, and comprises any information delivery or transport media.The term “modulated data signal” or signals refers to a signal that hasone or more of its characteristics set or changed in such a manner as toencode information in one or more signals. By way of example, and notlimitation, communications media comprise wired media, such as a wirednetwork or direct-wired connection, and wireless media such as acoustic,RF, infrared and other wireless media

Further, terms like “user equipment,” “user device,” “mobile device,”“mobile,” station,” “access terminal,” “terminal,” “handset,” andsimilar terminology, generally refer to a wireless device utilized by asubscriber or user of a wireless communication network or service toreceive or convey data, control, voice, video, sound, gaming, orsubstantially any data-stream or signaling-stream. The foregoing termsare utilized interchangeably in the subject specification and relateddrawings. Likewise, the terms “access point,” “node B,” “base station,”“evolved Node B,” “cell,” “cell site,” and the like, can be utilizedinterchangeably in the subject application, and refer to a wirelessnetwork component or appliance that serves and receives data, control,voice, video, sound, gaming, or substantially any data-stream orsignaling-stream from a set of subscriber stations. Data and signalingstreams can be packetized or frame-based flows. It is noted that in thesubject specification and drawings, context or explicit distinctionprovides differentiation with respect to access points or base stationsthat serve and receive data from a mobile device in an outdoorenvironment, and access points or base stations that operate in aconfined, primarily indoor environment overlaid in an outdoor coveragearea. Data and signaling streams can be packetized or frame-based flows.

Furthermore, the terms “user,” “subscriber,” “customer,” “consumer,” andthe like are employed interchangeably throughout the subjectspecification, unless context warrants particular distinction(s) amongthe terms. It should be appreciated that such terms can refer to humanentities, associated devices, or automated components supported throughartificial intelligence (e.g., a capacity to make inference based oncomplex mathematical formalisms) which can provide simulated vision,sound recognition and so forth. In addition, the terms “wirelessnetwork” and “network” are used interchangeable in the subjectapplication, when context wherein the term is utilized warrantsdistinction for clarity purposes such distinction is made explicit.

Moreover, the word “exemplary” is used herein to mean serving as anexample, instance, or illustration. Any aspect or design describedherein as “exemplary” is not necessarily to be construed as preferred oradvantageous over other aspects or designs. Rather, use of the wordexemplary is intended to present concepts in a concrete fashion. As usedin this application, the term “or” is intended to mean an inclusive “or”rather than an exclusive “or”. That is, unless specified otherwise, orclear from context, “X employs A or B” is intended to mean any of thenatural inclusive permutations. That is, if X employs A; X employs B; orX employs both A and B, then “X employs A or B” is satisfied under anyof the foregoing instances. In addition, the articles “a” and “an” asused in this application and the appended claims should generally beconstrued to mean “one or more” unless specified otherwise or clear fromcontext to be directed to a singular form.

In addition, while a particular feature may have been disclosed withrespect to only one of several implementations, such feature may becombined with one or more other features of the other implementations asmay be desired and advantageous for any given or particular application.Furthermore, to the extent that the terms “includes” and “including” andvariants thereof are used in either the detailed description or theclaims, these terms are intended to be inclusive in a manner similar tothe term “comprising.”

The above descriptions of various embodiments of the subject disclosureand corresponding figures and what is described in the Abstract, aredescribed herein for illustrative purposes, and are not intended to beexhaustive or to limit the disclosed embodiments to the precise formsdisclosed. It is to be understood that one of ordinary skill in the artmay recognize that other embodiments having modifications, permutations,combinations, and additions can be implemented for performing the same,similar, alternative, or substitute functions of the disclosed subjectmatter, and are therefore considered within the scope of thisdisclosure. Therefore, the disclosed subject matter should not belimited to any single embodiment described herein, but rather should beconstrued in breadth and scope in accordance with the claims below.

What is claimed is:
 1. A base station device, comprising: a processor;and a memory that stores executable instructions that, when executed bythe processor, facilitate performance of operations, comprising:selecting a first modulation scheme for an uplink data transmissionbased on channel state information for the uplink data transmission;facilitating transmitting a first selection of the first modulationscheme via a first downlink control channel transmission; in response toa change in a signal to noise ratio indicated by the channel stateinformation, selecting a second modulation scheme for the uplink datatransmission; and facilitating transmitting a second selection of thesecond modulation scheme via a second downlink control channeltransmission and not via radio resource control signaling.
 2. The basestation device of claim 1, wherein the channel state information isbased on user-equipment-specific reference signals.
 3. The base stationdevice of claim 2, wherein the user-equipment-specific reference signalscomprise sounding reference signals.
 4. The base station device of claim2, wherein the user-equipment-specific reference signals comprisedemodulation reference signals.
 5. The base station device of claim 1,wherein each modulation scheme of modulation schemes comprising thefirst modulation scheme comprises a different respective spectralefficiency.
 6. The base station device of claim 1, wherein the channelstate information comprises a computing channel quality indicator. 7.The base station device of claim 1, wherein the first selection isindicated via at most six bits.
 8. The base station device of claim 1,wherein the selecting the first modulation scheme further comprises:selecting the first modulation scheme from a group of transformprecoding disabled modulation schemes in response to the channel stateinformation indicating the signal to noise ratio as being above adefined level.
 9. The base station device of claim 1, wherein theselecting the first modulation scheme further comprises: selecting thefirst modulation scheme from a group of transform precoding enabledmodulation schemes in response to the channel state informationindicating the signal to noise ratio as being below a defined level. 10.A method, comprising: selecting, by a network device comprising aprocessor, a modulation scheme for an uplink data transmission based ona signal to noise ratio associated with the uplink data transmission;transmitting, by the network device, an indication of the modulationscheme via a downlink control channel transmission; in response to achange in the signal to noise ratio, selecting, by the network device, anew modulation scheme for the uplink data transmission that replaces themodulation scheme; and transmitting, by the network device, a newindication of the new modulation scheme via a downlink control channeltransmission.
 11. The method of claim 10, wherein the indicationcomprises an index number from a data structure, and wherein the indexnumber is associated with a waveform selection indicator, a modulationorder number, a code rate, and a spectral efficiency number.
 12. Themethod of claim 10, further comprising: selecting, by the networkdevice, the modulation scheme from a group of modulation schemesassociated with a transform precoding in response to the signal to noiseratio being determined to be above a predetermined level.
 13. The methodof claim 12, wherein the group of modulation schemes comprises fourmodulation types.
 14. The method of claim 10, further comprising:selecting, by the network device, the modulation scheme from a group ofmodulation schemes not associated with transform precoding in responseto the signal to noise ratio being determined to be below apredetermined level.
 15. The method of claim 14, wherein the group ofmodulation schemes comprises five modulation types.
 16. The method ofclaim 10, wherein the selecting of the modulation scheme comprisesselecting from a group of modulation schemes associated with transformprecoding and a group of modulation schemes not associated withtransform precoding.
 17. The method of claim 16, wherein the selectingof the modulation scheme further comprises selecting from the group ofmodulation schemes not associated with transform precoding in responseto the signal to noise ratio being below a defined level.
 18. Anon-transitory machine-readable storage medium, comprising executableinstructions that, when executed by a processor of a device, facilitateperformance of operations, comprising: selecting a first modulationscheme for an uplink data transmission of a user equipment device basedon channel state information for the uplink data transmission;transmitting a first indication of the selecting of the first modulationscheme via a first downlink control channel transmission; in response toa change in a signal to noise ratio indicated by the channel stateinformation, selecting a second modulation scheme for the uplink datatransmission to replace the first modulation scheme; and transmitting asecond indication of the selecting of the second modulation scheme via asecond downlink control channel transmission and not via radio resourcecontrol signaling.
 19. The non-transitory machine-readable storagemedium of claim 18, wherein the selecting of the first modulation schemecomprises the selecting of an index number.
 20. The non-transitorymachine-readable storage medium of claim 18, wherein the operationsfurther comprise merging a first group of modulation coding entries thatcorrespond to transform precoding with a second group of modulationcoding entries that are associated with transform precoding disabledmodulation schemes.